<!DOCTYPE html>
<html>
<head>
   <link href="build/classic/theme-classic/resources/theme-classic-all.css" rel="stylesheet" />
   <script type="text/javascript" src="build/ext-all.js"></script>
   <script type="text/javascript">

   </script>
</head>
<body>
    <h1> 详见以下网站：</h1>
      <a href="https://www.w3cschool.cn/extjs/extjs_layouts.html">W3school extjs 布局</a>
</body>
</html>